Hydrometer.



J. ELY.

HYDROMETBR.

APPLIOATION FILED AUG. 14, 1907.

Patented Ju1y19,1910.

nwan to@ v @Hoang JAMES ELY, on SUMMIT, NEW JERSEY, ASSIGNoR, RY MESNEASSIGNMENTS, To TAYLOR INSTRUMENT COMPANIES, or ROCHESTER, NEW YORK, ACORPORATION 0F NEW YORK.

Specification of Letters Patent.

HYDROMETER.

`Patented July t9, 19M.

To all whom t may concern:

Be itknown that l, JAMES ELY, of Summit, in the county of Union andState of New Jersey, have invented certain new and useful Improvementsin Hydrometers; and l do hereby declare the following to be a full,clear, and exact description of the same, reference being had to theaccompanying drawings, forming a part of the specification, and to thereference-numerals marked thereon.

rllhis invention relates to hydrometers and it has for an object toprovide an instrument by whichthe percentage of a solution and thefreezing point thereof may be quickly ascertainedv To these and otherends the invention consists in certain improvements and combinations ofparts all as will be hereinafter more fully described, the novelfeatures being pointed out in the claim at the end. of thespecification.

ln the drawings:l Figure l is a view of one side of an instrumentconstructed in accordance with my invention. Fig. 2 is a view oftheopposite side; and Fig. 3 is a horizontal section through the indicatingportion.

ln measuring the percentage of some solutions such as calcium chlorid itis desirable also to know the freezing point thereof. @f course oncehaving obtalned the percentage the freezing' point may be ascertained,but this requires time andin addition errors in calculations are likelyto occur, and further some people owing to the lack of knowledge alongthis line, are unable to obtain this information. rlhis instrument makesit possible for any one to maintain in an apparatus as for instance, arefrigerating plant, a working solution which will be economical, and atthe same time free from all danger of freezing.

As shown the invention comprises a ioat l, a weight 2 arranged beneaththe same and an indicating portion 3 projecting upwardly from the float.These parts are preferably made from a piece of glass the float portionof which is hollow and the weight portion 'containing shot or othermaterial. The indicating portion is preferably in the form of a longnarrow and fiat hollow body or stem in which is arranged a strip ofsheet material containing two correspondingly divided scales 4 and 5,the former having numerals adapted to indicate the percentage of amaterial at a certain temperature, say calcium chlorid at 60 Fahr. andthe latter having numerals adapted to indicate the freezing point of thesolution. These scales are preferably arranged on opposite sides of theindicating portion so that there will be no confusion in reading themand as the stem or indicating portion is AHat the hydrometer will notrotate.

l claim as my invention.

ln a hydrometer, the combination with a float and a weight, of a longnarrow dat and hollow indicating portion made of glass and a strip ofmaterial `arranged within the same and having on one side a scaleprovided with numerals to indicate the percentage of the material in asolution, and 0n the opposite side a scale correspondingly divided andprovided with numerals to indicate the freezing point of the solution.

JES ELY. Witnesses:

H. H. SIMMs, HENRY W. HALL.

